What is the relationship between Ursa Major and Ursa Minor? How to distinguish them?

ursa major

Abbreviation: UMa

Approximate area: 1280 sq.

A constellation suitable for spring observation, where the famous Big Dipper is located.

[Greek mythology] Mother and child are affectionate-a cowardly father.

There is a goddess named Crystal. She is gentle and beautiful. Zeus likes her very much. After various pursuits, she gave birth to a son named Arcaz. When Hera, the jealous queen, knew it, she flew into a rage, turned Crystal into a big bear and rushed into the forest. Arcaz, who lost his mother when he was a child, became a very good hunter when he grew up, but he didn't know what happened to his mother. One day, Sheila asked fate to arrange for Axe to meet his mother bear in the forest. When her mother saw her son who had been missing for many years, she was so excited that she forgot that she had become a big bear that she couldn't help rushing to arcas. Arcaz thought the bear was going to hurt him, so he immediately raised an arrow to shoot it. Just when the mistake of killing his mother was about to be caused, Zeus broke through the knot of guilt and timidity, and turned Arcaz into a little bear and put it in the sky as the constellation Ursa major, so that their mother and son could be together forever. But the story is not over, and the queen still hasn't given up. With the help of the gods, she drove Ursa Major and Ursa Minor near the North Pole, forcing them to revolve around the North Pole day and night, without a moment's peace, while other constellations in the sky could sink to the bottom of the sea for half a day.

[Oriental Legend] Beidou Shen Jun-Siming Shen Da

China called the Big Dipper the God of the Big Dipper in ancient times. There is a common saying that the God of the Big Dipper holds the power of life and death. It is said that Peng Zu begged the Big Dipper for mercy, so he lived to be 800 years old. It is also said that there are nine planets in the Big Dipper, two of which are hidden in a bucket, and the god in the bucket is the Jade Emperor. It is not easy to be seen. If someone sees it, he can prolong his life. It is said that Huo Guang, the prime minister of the Han Dynasty, had a servant.

English: Bear, plough or Big Dipper.

Bright star:

Dubhe: magna.2,0ra:11h03m43.73sdec:+6145' 03.3 ".

The constellation Ursa major β: β urase maioris (merak): magn.2,4 ra:1h 01m50.47 sdec:+56 22' 56.5 ".

Phecda: magn.2,5ra:11h53m49.81sdec:+5341'41".

Ursa major: Ursa major (Megrez): magn.3,4 ra:12h15m25.54 dec:+57 01'57.3 ".

Ursa major ε: ε urae maioris (Ellioth): magn.1.7ra:12h54m01.73sdec:+5557' 35.6 ".

Ursa major: magnetic induction intensity:13h23m55.52s dec:+54 55' 31.4 "

Ursa major η: etaurae maioris (alka id): magn.1,9ra:13h47m32.47sdec:+4918' 48.1".

Theta: theta Ursae maioris: magn.3 ra: 09h32m51.64dec:+5140' 39.5 ".

Ursa major: magna.3,1ra: 08h59m12.55s dec:+4802' 30.3 ".

Ursa major: magna.3,5ra:10h17m05.83sdec:+42 54' 51.9 ".

Ursa major (Tania Island, Australia): Geomagnetism:10h2m19.76 south latitude: +4 1 29' 58.2 "

Ursa major: magnetic induction intensity: 08h 30m15.92s dec:+60 43' 05.7 ".

Ursa major: magnetic force 3,1ra:11h09m39.80sdec:+4429' 54.7 "

An important constellation in the northern sky, the third in the all-sky area: second only to Ophiuchus and Virgo. Because of the existence of the Big Dipper (from Alpha Ursa major to η Ursa major, except for Delta Ursa major, the other six are bright stars above second star), Ursa major is probably the most famous constellation in the whole day. The first two stars of the Big Dipper, α and β, are signs for finding the North Star, and the connection between these two stars directly points to the North Pole.

The second star with spoon handle (ζ Ursa major) is actually a cluster star, and we can see a fourth-class companion star Alcor with naked eyes. Through the small telescope, we can also see another star near Ursa major, which is also a 4-star. In fact, these three stars are each a binary system, so this is a six-star system.

Another interesting thing is Ursa major ξ, a binary system consisting of two yellow stars, which have been moving with each other for 60 years.

This constellation has two spiral galaxies: M8 1 of 8 and M 10 1 of 9.

The constellation Ursa major means that there used to be a beautiful girl. This girl had such a love affair with Zeus, the greatest god in the sky, which also gave birth to a son, Achatz. But this matter was known by Zeus' wife (Hera), and Hera was very angry when she knew it. She cast a magic spell and turned the girl into a big bear. Then he became a bear. 15 years later, the child Achatz grew up. He became a very good hunter when he grew up. Hera, Zeus' wife, is really vicious, and she will not let them go. One day, she arranged a bear. The original girl turned into a bear and met the hunter, her son Achatz, in the forest. This Achatz could not know that the bear in front of him was his mother, so he naturally picked up a spear and stabbed it. Fortunately, Zeus saw this scene in the sky just before the tragedy, and then he was soft-hearted and couldn't bear to see such a thing happen. So soon, he also cast a magic to turn this Arcaz into a bear, at least their mother and son can live together. So now the place not far from Ursa major in the sky is Ursa minor.

Connecting the main bright stars in the star map is more like a little Beidou than a little bear. The Big Dipper in Ursa minor is not only much smaller than that in Ursa major, but also the other seven stars are smaller than 4 except that α and β are second-class stars and γ is third-class. Unlike the Big Dipper in Ursa Major, the other six stars are all second-class except δ. So this little Big Dipper is far less eye-catching than the Big Dipper. People usually notice only the North Star.

The position of the earth's rotation axis in the sky is very stable, so people define the direction of the earth's rotation axis in the sky as south and north. Polaris is just in the direction of the earth's rotation axis, so in ancient times, when people sailed in the sea and trudged in deserts, forests and wilderness, they always turned to it to indicate the direction. People worship it so much that China even regarded it as a symbol of ancient emperors. Even in today's highly developed science and technology, Polaris still has very important applications in astronomical measurement, positioning and many other aspects.

In fact, Polaris is not entirely in the North Pole. It is far from the North Pole 1, but there is no other star closer to the North Pole, so it is regarded as the nearby North Pole. If we stand at the north pole of the earth, the Polaris is directly above us. In other parts of the northern hemisphere, people see that Polaris is always in that position due north. Moreover, due to the rotation and revolution of the earth, the constellations in the northern sky seem to revolve around the North Star every day and every year. In particular, the spoon mouth points to the big dipper of Polaris, which rotates around it and never stops. The ancients in China were deeply touched by this and wrote in the Book of Changes, "Heaven is healthy, and gentlemen are constantly striving for self-improvement." If it makes sense.